We've had several times a request for tournament format support... this could be done mid term by extending the "pack" system I believe, but it is not one of my priorities. I know a growing people are using Wagic for "real life" deck testing, and honestly I'm honoured because I didn't think it would ever become good enough that it allows people to playtest decks...

I personally have little interest in tournaments (having basically nobody to play that game with), but if any dev is interested in that, what you suggest would indeed be a very welcome addition